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A threshold fatigue crack closure model: Part II – experimental verification
Author(s) -
NEWMAN J. A.,
RIDDELL W. T.,
PIASCIK R. S.
Publication year - 2003
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1046/j.1460-2695.2003.00635.x
Subject(s) - closure (psychology) , plasticity , crack closure , mechanics , materials science , surface finish , surface roughness , threshold model , mechanism (biology) , experimental data , structural engineering , fracture mechanics , mathematics , composite material , physics , econometrics , engineering , statistics , quantum mechanics , economics , market economy
Predictions from an analytical model that considers contributions and interactions between plasticity, roughness, and oxide induced crack closure are presented and compared with experimental data. The analytical model is shown to correctly predict the combined influences of crack roughness, oxide debris, and plasticity in the near‐threshold regime. Furthermore, analytical results indicate closure mechanisms interact in a non‐linear manner such that the total amount of closure is not the sum of closure contributions for each mechanism.